Bus heating system



L. P. HYNES BUS HEATING sYsTEia Filed F'eb. 2, 192s Patented Sept. 29, 1931 UNITED y STATES v*PATENT OFFICE LEE P. HYNES, OF ALBANY, NEW YORK, .ABSIGNOR, BY MESNE ASSIGNMENTS, TO CON- SOLIDATED CAR-HEATING OF NEW YORK COMPANY, INC., OF .ALBANY NEW YORK, A CORPORATION Bus mimmo sxsrmr v Application led February 2,-1928. vSerial No. 85,501. v

For a detailed description of the resent .form of m invention, reference ma had to the fo lowin specification an to the accom anying rawing forming a part thereo My invention relates to the heating of busses or other vehicles equipped with a `hydrocarbon engine, the heat being derived from the re-combustion of the contents of the engine exhaust. In the present case I provide a supplementary heater so arranged as to serve alternately with lthe said recombustion to provide heat for the bodyfand also for engine and' radiator when the en- 5 gine is not running.

Referring to the drawing, Z is the body of the vehicle; A represents the exhaust manifold of the engine, which is contained in a suitable enclosure B, and C is the enclosure for the transmission gearing and other attachments. -D is the exhaust tube leading from manifold A through a mixing chamber E, shown as drawing in air through an opening on its under side, said tube terminating at its'left end in a nozzle that gives velocity to the outiiow therefrom. F is a combustion chamber wherein the recombustion takes lace, the exhaust gases emerging from tu e D and min led with air drawn in through tube. E bemg delivered into said combustion chamber and ignit'ed by a sparkug G, or by the supplementary burner The said supplementary burner is located in the bottom of casing F and is sup lied with fuel, such as gasolene, from ta `J, wherein air pressure is maintained by an a1r pipe K. From the top of casing F three pi s extend. The pipe P, controlled by a amper U, leads .to engine casing B and thence, by pipe X,

to the lower end of radiator T against which the heated products are finally delivered. The pipe O, controlled by twoway damper, leads to the boiler Q and the products of combustion, after passing through the boiler tubes, pass by pipe R to the final exhaust pipe S, which constitutes the third pipe extending from the ltop of casing F and is also controlled by two-way damper V, by which the outflow from the casin may be diverted, either artly or com etel into the pipes O and) S alternate y. `rom boiler Q a supply pipe Y leads to suitable radiators in the vehicle body Z. So long as the engine is running, damper W being open and dampers V and U'closmg plpes S and P respectively, the exhaust gases will be re-burned in the reburner formed by casing F, and the heated products of the re-combustion will through the boiler Q, giving up their eat to the water therein and emerge into the atmosphere through pipes R and S. If the damper U is opened, other conditions remaining the same, a part of the heated products will pass into pipe P and thence -go to the engine and radiator, so as to raise the temperature thereof tov improve operating conditions in cold weather. Or, if damper V is turned to close pipe O and open pipe S, damper U being closed, all o the products will pass directly to the atmosphere through pipe S. Dampers U and V may be set to any desired intermediate positions for partlal results. There are, however, occasions when it is not feasible to keep the engine running, as when the bus is left overnight in the open or in a cold garage, or when it might be stalled in a snow storm with little or no engine gasolene in its tank. For such occasions 'the said burner H is provided, in the bottom of casing F. Ithas a separate fuel tank J controlled by a cock y'. When this cock is opened the fuel, which may be' gasolene or other suitable liquid hydrocarbon, will flow under` tank air pressure into heater H and air will be drawn in with it throughl the hicle equipped with an internal combustion engine and the radiator of said engine. comprising a combustion chamber external of said engine, a mixing chamber in communication with said combustion chamber and having an air inlet, means for discharging exhaust gases from said engine through sai mixing chamber so as to induce an iniiow of air through said air inlet, and to discharge the mixed air and gases into said combustion chamber, an ignition device within said combustion chamber, a fuel burner in said combustion chamber, means for supplying fuel to said burner, and means for causing the heat produced by the reburning of said exhaust gases `while the engine is operating, or the heated air from the fuel burner while the engine is idle to be transferred to said vehicle or to the radiator of said engine.

2. Means for heating a Vehicle equipped with an internal combustion engine, comprising a combustion chamber, a mixing chamber in communication with said combustion chamber and having an air inlet, means for discharging exhaust gases through saidmixing chamber, so as to induce an inflow of -air through said inlet and to discharge the mixed air and gases into the combustion chamber, an ignition device within said combustion chamber, a supplemental liquid fuel burner -in said combustion chamber, a boiler having a heating chamber communicating with said combustion chambei', so that the boiler will be heated by the reburning of the exhaust gases, and radiating means connected with said boiler and located within the space to be heated.

3. Means for heating an automotive vehicle equip ed with an internal combustion engine or t e radiator of said engine, comprising a combustion chamber external of' said engine, a mixing chamber 1n communication with said combustion chamber and having an air inlet, an exhaust gas pipe positioned to discharge exhaust gases from said engine through said mixing chamber so as to induce an inflow of air through said inlet and to discharge the mixed air and exhaust gases into said combustion chamber, and ignition device within said combustion chamber, a fuel burner in said combustion chamber, means for supplying fuel to said burner, a heating medium for the space to be heated, means for conveyingthe heat produced by the reburning of said exhaust gases while the engine is operating, or the heated air from said fuel burner while the engine .is idle to said heating medium, separate means for conveying said heat of the reburned gases or heated air from said burner to the engine andits radiator, means for conveying said products of recombustion to the atmosphere, a damper for diverting said products of recombustion partly or completely to the heating medium or to the atmosphere, and a separate damper controlling the flow of products of combustion to the engine and radiator.

4. Means for heating an automotive vehicle equipped with an internal combustion engine and the radiator of said engine comprising a combustion chamber external of said engine, a mixing chamber in communication with said combustion chamber and having an air inlet, means for discharging exhaust gases from said engine through said mixing chamber so as to induce an inflow of air through said inlet and to discharge the mixed air and exhaust gases into said combustion chamber, a heating medium for the vehicle, means for conducting the heat pro duced by the reburning of said exhaust gases while the engine is operating or the heated air from said fuel burner while the engine is idle to said heating medium, and se arate means for conducting said heat of t e reburned gases or heated air from said burner forwardly to the engine and its radiator so as to raise the temperature thereof.

5. Means for heating an automotive vehicle equipped with an internal combustion engine and the radiator for said engine comprising a combustion chamber external of said engine, a mixing chamber in communication with said combustion chamber and having an air inlet, means for discharging exhaust gases from said engine through said mixing chamber so as to induce an inflow of air through said inlet and to discharge the mixed air and exhaust gases into said combustion chamber, a boiler, radiator means connected with said boiler and located in the vehicle body, means for conducting heat produced by reburning said exhaust gases while the engine is operating or heat produced by said burner while the engine is idle to the boiler so as to heat the same, a damper for diverting said heat partly or completely from the boiler to the atmosphere, and separate means for conveying said heat to the engine and its radiator.

6. Means for heating a vehicle equipped l with a hydrocarbon engine comprising a casing provided with a combustion chamber and a mixing chamber, la burner located within said combustion chamber, means for supplying liquid fuel thereto, a conduit connecting said mixing chamber with the exneegf within said combustion chamber, ineens for -I supplying liquid fuel thereto, e. conduit con meeting said g chamber with the exhaust menifold of the engine, said mixin chamber having an air inlet adjacent to sai conduit, a, boiler, radiator ineens connee With the boiler and located in the vehicle body, e pipe connecting seid combustion chamber with seid boiler so as to heet the seme, e second pipe connecting seid combastion chamber with the atmosphere, o damper for divertin f the products of recombustion from seid mv to the swdischarging into the etmosphere, and a, @per controlled conduit connecting seid casing with an enclosure containing seid engine.

Si ed at Albany, county of Albany, Stete of Div York, this 30th day of Jan., 1926.

LEE P. HYNES. 

